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Technical Articles

  • Hydraulic Calculations

    Back to Basics Hydraulic calculations completed by hand are a thing of the past. Computer programs can provide you with pages of information at the cl…

  • Longitudinal Sway Bracing of CPVC

    Using an NFPA 13 Analogy There are very few listed sway brace fittings for CPVC pipe. Listing criteria specified by the CPVC resin manufacturers and r…

  • Omitting Flow From Sprinklers in the Design Area

    Identifying Acceptable Small Compartments One of the key aspects of designing a sprinkler system is making sure that the water supply can handle all o…

  • When is Loading Detrimental to Sprinkler Performance?

    A Look Into Loading’s Effect on Sprinkler Thermal Sensitivity The 2017 edition of the NFPA 25, Standard for the Inspection, Testing, and Maintenance o…

  • Temperature Change

    Listed Spray Sprinklers

    What Else the Testing Tells Us A common part of our industry is the use of Listed components. Other than the general understanding that this requireme…

Hydraulic Calculations

Back to Basics Hydraulic calculations completed by hand are a thing of the past. Computer programs can provide you with pages of information at the click of a mouse. However, given the demand for new sprinkler designers, there is a need to return to the basics. Designers, particularly newer designers, …

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Longitudinal Sway Bracing of CPVC

Using an NFPA 13 Analogy There are very few listed sway brace fittings for CPVC pipe. Listing criteria specified by the CPVC resin manufacturers and recognized by Underwriters Laboratories (UL) define the mechanics required of listed CPVC sway brace fittings and their design. Accordingly, UL listing requires strictly defined features …

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Listed Spray Sprinklers

Temperature Change

What Else the Testing Tells Us A common part of our industry is the use of Listed components. Other than the general understanding that this requirement provides a level of confidence that the devices will work, we typically don’t give the subject a lot of thought. There are multiple aspects …

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Identifying Microbes

What is Contaminating My Fire Sprinkler System? While microorganisms do not produce unique types of corrosion, they can accelerate corrosion reactions. Microbial action has been identified as a contributor to rapid corrosion of metals and alloys exposed to soils; seawater, distilled water, and freshwater; crude oil, hydrocarbon fuels, and process …

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Bolted Steel Tanks

Bolted Steel Tanks

The Right Fit for Fire Protection Over the last 100 years, the methods to store water for fire protection have evolved and become more sophisticated, resulting in superior fire suppression. Modern tanks that store water used for fire protection are very specific and are governed by NFPA 22, Standard for …

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Questions About NFPA 30?

Questions About NFPA

Informal Interpretations Help Douse Disagreements The informal interpretations featured in this issue of Sprinkler Age address NFPA 30, Flammable and Combustible Liquids Code. AFSA’s informal interpretations are provided to AFSA members by Senior Vice President of Engineering & Technical Services Roland Huggins, P.E. and Senior Manager of Fire Protection Engineering …

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Protecting Paint Booths

Protecting Paint Booths

Running the Criteria Gauntlet The first time I was presented with someone in need of an estimate to protect a paint booth was many years ago. I looked to others in the office for guidance, but I seemed to mostly get answers that involved “I think,” “I’m pretty sure,” or …

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